XmlOrderNamespaceService.java

package camelinaction;

import org.apache.camel.Body;
import org.apache.camel.language.Bean;
import org.apache.camel.language.NamespacePrefix;
import org.apache.camel.language.XPath;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Node;

/**
 * Order service using XML namespace in the XPath expression
 */
public class XmlOrderNamespaceService {

    public Document handleIncomingOrder(@Body Document xml,
                                        @XPath(value = "/c:order/@customerId", 
                                               namespaces = @NamespacePrefix(
                                                   prefix = "c",
                                                   uri = "http://camelinaction.com/order")) int customerId,
                                        @Bean(ref = "guid", method = "generate") int orderId) {

        Attr attr = xml.createAttribute("orderId");
        attr.setValue("" + orderId);

        Node node = xml.getElementsByTagName("order").item(0);
        node.getAttributes().setNamedItem(attr);

        return xml;
    }

}